Plant root cells

[gizmogirl1993]

i need help on my science homework because im stuck on 2 questions

1. suggest why giving roots plenty of oxygen affects the uptake of sulfate ions

2. explain why over-watering pot plants can kill them and why very few different species of plants can grow in marshes

ill be grateful for any help

*i've got a table which shows that with barley seedlings, when put in cuture solutions. container 1 had oxygen bubbled through and container 2 had nitrogen bubbled through. the page says that nitrogen gas is very inert. the results show that container 1 was considerably higher than container 2 by an average differnce of 178 of sulfate ions absorbed by the plant

[JackBean]

I guess, because the incorporation is reductive, thus oxygen will deplenish reductive potential (glutathion, redoxin etc.), but I didn't find anything like transport inhibition or sensitivity to oxygen like with nitrogen fixation...

[mamoru]

i need help on my science homework because im stuck on 2 questions

1. suggest why giving roots planty of oxygen affects the uptake of sulfate ions

2. explain why over-watering pot plants can kill them and why very few different species of plants can grow in marshes

ill be grateful for any help

1. I actually don't know, so if you find out, please share.

2.) Do you know how plant roots absorb water? If not, look it up (hint: it involves active transport, but NOT of water), and then think about what would happen if the "solution" around the roots were to be over-dilute. Sorry to not give a direct answer, but I wouldn't want to deny you the thrill of figuring it out.

If you still have trouble, post what you find about how roots absorb water and anything that confuses you, and we'll take it from there.

[jwalin]

ain't too sure but here's what i think


1.see the take up of ions requires energy therrefore to drive it you need active transport and oxygen. so...

2. should i help
okay
its related to osmosis

[JackBean]

so, you have higher uptake with oxygen, right?

[jwalin]

yes
thats what i have learnt till now